Cron expression (UNIX).
Readonly
Cron CronDayOfMonth object.
CronDayOfMonth
Cron CronDayOfWeek object.
CronDayOfWeek
Cron CronHours object.
CronHours
Cron CronMinutes object.
CronMinutes
Cron CronMonth object.
CronMonth
Cron expression (UNIX).